Run Start Capacitor, Round, 35/10 MFD, 440/370

HVAC System Support – Mars 12797 Dual Motor Run Capacitor

The Mars 12797 Dual Motor Run Capacitor is engineered for use in systems requiring dual-capacitance support, commonly found in air conditioning and refrigeration units. With a capacitance rating of 35/10 microfarads (MFD) and a voltage rating of 440V AC, it delivers consistent performance for both compressor and fan motor circuits in PSC (permanent split capacitor) configurations.

Its compact cylindrical housing and dual terminal configuration allow for integration into standard service environments. This component is suitable for new installations, scheduled maintenance, and replacement applications across residential and light commercial HVAC systems.

Functional Advantages for HVAC Technicians

Built with contractor-specific use cases in mind, the Mars 12797 offers:

• ✅ Dual Motor Operation – Supports simultaneous function of compressor and fan motors from a single unit, reducing space and wiring complexity.
• ✅ 440V AC Rating – Withstands higher voltage environments, reducing failure rates under thermal load.
• ✅ Non-PCB Construction – Environmentally safer internal materials with compliance to modern standards.
• ✅ Hermetically Sealed – Aluminum case construction for improved durability and dielectric integrity.

Technical Specifications

• Capacitance: 35/10 MFD (Microfarads)
• Voltage Rating: 440V AC
• Shape: Round Canister
• Manufacturer: Mars
• Model Number: 12797

Installation Guidelines

Installation should be completed by licensed HVAC personnel familiar with capacitor discharge protocols and voltage verification. Ensure terminals are matched precisely to the existing wiring configuration. Prior to service, always confirm system power isolation and perform capacitance testing with a calibrated multimeter.

• ???? Hand tools (screwdriver or nut driver for access)
• ???? Multimeter or capacitance meter
• ???? Insulated gloves and lockout tagout procedures as required

Capacitor should be mounted securely to avoid vibration-related fatigue. Terminal leads must be fully seated to maintain contact integrity under system cycling.

Job Site Application

The Mars 12797 is specified for field service work involving condenser fan motor and compressor capacitor replacement. Its dual configuration allows for rapid substitution in systems requiring compact, space-efficient solutions. Compatible with OEM and aftermarket units that fall within specified electrical tolerances.

Component Highlights

• ✅ Dual Capacitance – Supports two motor circuits within a single enclosure.
• ✅ High Voltage Endurance – 440V AC rating ensures robust performance in elevated ambient temperatures.
• ✅ Trusted Manufacturing – Produced by Mars, a recognized supplier in the HVAC replacement component industry.
• ✅ Compact Profile – Allows installation in space-restricted cabinets and service enclosures.

Specification-Driven Performance

The Mars 12797 capacitor provides dependable operation for contractors needing a reliable dual-run solution. Its electrical profile, construction quality, and dimensional design support rigorous use in both maintenance and replacement scenarios. Designed to meet the expectations of licensed professionals across a range of HVAC applications.